Time: 1 slide ≈ 1 minute · Martinとコード

About as many slides as you have minutes. Twenty-five screens for three minutes is a trap.

A minute has one slide. Not twenty-five.

The teacher says: three minutes. You bring twenty-five slides, because “it was interesting”.

It is not interesting. It is a race with the bell. Every slide wants at least a sentence out loud. A sentence takes time.

So a rough rule: one slide, one minute. Three minutes, three to five slides including the title.

It is not a law of physics. It is a brake against the fear that few slides = little work. At school few slides is often more work, because you have to choose.

Example: Adam had eighteen photos, managed six, left the important one at the end. Ema had five slides and a stopwatch. She got to the question.

Today you count minutes on paper, count thumbnails on the left and delete the extra. Delete on filler is a success, not a loss. Title and ending eat a minute too. They are not free.

Adam had eighteen photo slides for a hobby. He managed six and the bell. He left the most important at the end. The end he did not make.

Ema had five slides and a stopwatch on a parent’s phone. She got to the question at the end and had a minute left for an answer.

The difference is not talent. It is counting. Today you do not even have to make eighteen slides. It is enough to see the number on the left and match it to the minutes you really have. A lesson does not last forever. Your slot does not either.

💡

Title and ending eat a minute too. They are not free. If you have three minutes, title, core, end — that is already three slides.

The number of slides is a time budget

On the left in Slides and in PowerPoint you see thumbnails. The number is a budget.

When you speak calmly and do not read a paragraph, roughly a minute per slide. When you read a paragraph, the slide eats more and still badly. So paragraphs off and the number down.

How to delete: click the thumbnail, Delete, or Slide → Delete slide. A duplicate that carries nothing new, off. Photos “this one too” off.

When Storyteller comes, five slides for a hobby is a project exactly because it hits time and choice. Now you practise the brake.

The brake is set before decoration. If you decorate twenty slides first, deleting hurts. If you count minutes first, you decorate five.

Slot: 4 minutes.

Ema: title, three cores, end = 5 slides, tight, stopwatch. She got to the sentence.

Adam: 12 slides, bell in the middle, the main idea on slide 11. The teacher heard the intro and not the core.

The difference is not who knows more. It is who threw more away. Even one slide has time: a minute, not five minutes reading a life story. A life story is a notebook. A slide can carry a minute of eyes.

⚠️

Do not speed up your speech to defend twenty slides. The class stops keeping up. Delete slides. Speech tempo will not save a bad number.

Four things you will build in this course

The course has four small projects. You do not have to do them all at once. Today you add only this:

🎯 A hobby in 5 slides

Five slides about something you like doing. One sentence about what it is. No paragraphs from your notebook.

Hobby: five slides, not a holiday album.

📚 A report

Eight slides for school: a start, three proofs, an end. The title on every slide is a sentence, not “Slide 3”.

Report: eight slides for the school slot, not twenty-five from Wikipedia.

📊 Survey results

A chart from a table (not a screenshot from chat) and under it where the numbers come from.

Survey: a chart and a close, not each answer its own slide.

⚖️ A defence

You say one sentence, show proof, answer “and what if…”. If you do not know, you say I don’t know.

Defence: five minutes, five anchors, not ten side tracks.

Count the minutes, delete the extra

You set a fake slot and match it to the number of thumbnails. Deleting is a success, not a loss.

Write on paper how many minutes you really get at school. If you do not know, put three. In Slides on the left count the thumbnails. Write the number next to the minutes. If there are more slides than minutes plus one, you will delete.
Slide → New slide several times on purpose, so you have more slides than minutes. On each write the word Filler. Now you can see the sin of volume. The class would flip Filler, Filler, Filler.
Click a Filler thumbnail. Delete. Repeat until the number of slides is a minute plus one at most. Count the title. In PowerPoint almost the same: Delete on the thumbnail. Ctrl+Z if you delete the wrong one.
On the remaining slides one sentence, not a paragraph. Present (F5), flip with the arrow and count out loud: one, two, three. If you talk long on one slide, it has too much, or you are reading a notebook. メモbook down into notes.
On paper a sentence: I have X minutes and Y slides. Y is not bigger than X plus one. When you want to add “one more photo”, read the contract. The photo can wait, or it replaces another slide.

A contract with minutes

Without a number on paper, “one more slide” always wins.

Ask about the next presentation at school how many minutes it is. Write it down.
Delete one slide that carried nothing new. Leave a pause in its place.
Tell a parent the rule one slide, one minute.

Now you 💪

I know how many minutes I have, not how many I would like.
The number of thumbnails is not a lot bigger than the number of minutes.
I deleted filler, instead of speeding up my speech.

✅

Done when: You can match the number of slides to the minutes and delete the extra without panic.

What to take from this lesson

1 slide ≈ 1 minute is a brake, not a dogma.
Title and ending eat time too.
Deleting is preparation, not lost work.
Fast speech will not save twenty slides.
Important things first, not on a slide you will not make.
名前s in the examples (Ema, Adam) are made up. Do not put your number, email or photo on a slide.